I'd like to know, how to launch dfs on java, to make it work pretty fast. $$$n = 2\,300\,000$$$.

Submit 54911336, says that on codeforces (windows, java32 1.8.0_162) time in dfs = 126ms.

Locally (windows, java64 11.0.1) i have time in dfs = 13913ms. The difference is 100 times!

Petr (windows, java 1.8.0_181) gets 15 seconds.

Command line options are java -XX:NewRatio=5 -Xms8M -Xmx512M -Xss64M. Taken from here.

How long it works for whom? (i'm interested in time, os/processor, java version, command line options)

How to reach 126ms locally?

UPD:
Locally if i add -XX:TieredStopAtLevel=1 (help) i get 387ms.
Command line options "exactly as on codeforces" locally on java64 give me the same time 13913ms $$$\pm\varepsilon$$$. So it's important to use java32.